20401333111 has 2 divisors, whose sum is σ = 20401333112. Its totient is φ = 20401333110.

The previous prime is 20401333093. The next prime is 20401333153. The reversal of 20401333111 is 11133310402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20401333111 - 2⁵ = 20401333079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20401633111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10200666555 + 10200666556.

It is an arithmetic number, because the mean of its divisors is an integer number (10200666556).

Almost surely, 2^20401333111 is an apocalyptic number.

20401333111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20401333111 is an equidigital number, since it uses as much as digits as its factorization.

20401333111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20401333111 its reverse (11133310402), we get a palindrome (31534643513).

The spelling of 20401333111 in words is "twenty billion, four hundred one million, three hundred thirty-three thousand, one hundred eleven".